Circumference Teacher Resources
Find Circumference lesson plans and worksheets
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The Circumference of a Circle and the Area of the Region it Encloses
6th - 8th CCSS: Designed
Bring your math class around with this task. Learners simply identify parts of a given circle, compute its radius, and estimate the circumference and area. It is a strong scaffolding exercise in preparation for applying the formulas for...
Circumference and Diameter Relationship
6th - 8th CCSS: Designed
With a ruler and a piece of string, geometers measure the circumference of a circular object. Tracing and folding it, they find the diameter of the resulting circle so that they can relate it to the circumference. It is recommended that...
Find the Circumference of a Circle
4 mins 6th - 9th CCSS: Designed
Solving for circumference is an easy as one, two, pi! Show your learners what pi is and how to use it in an equation. This second video in a series uses the circumference and the radius as a ratio to show that 3.14 is a constant in these...
Families of Parallel Lines and the Circumference of the Earth
9th - 10th CCSS: Designed
How do you fit a tape measure around the Earth? No need if you know a little geometry! Pupils begin by extending their understanding of the Side Splitter Theorem to a transversal cut by parallel lines. Once they identify the proportional...
Formulas for Circle Area and Circumference: Simple as Pie
3 mins 6th - 7th CCSS: Designed
Calculating circumference is as easy as pi times diameter. A short video explains how to measure pie tins using the diameter. It also describes the relationship between diameter and circumference. Using the knowledge, scholars consider...
Discovering the Formulas for Circumference and Area of a Circle
9th - 12th CCSS: Designed
Find formulas using direct measurements and reconstruction. Groups use diagrams of circles and measure their circumferences. With several examples, classmates determine the constant of variation, pi. Pupils continue exploring circle...
Area and Circumference of Circles
9 mins 8th - 10th CCSS: Adaptable
Don't go around and around, help your class determine amounts around and in a circle with a video that connects circumference to the perimeter or the distance around an object. The resource includes 14 questions dealing with circles and...
Circumference, Volume of a Cone, Pythagorean Theorem (L1.5)
10 mins 8th - 11th CCSS: Adaptable
There's a formula for that. An educational video shows viewers how to apply geometry formulas to solve problems. It covers the formulas for the circumference of a circle, volume of a cone, and the Pythagorean Theorem.